Abstract
We report the occurrence of the rare and enigmatic diatom species Cymbopleura semirecta (Manguin ex Kociolek & Reviers) Bahls here for the first time from the southern Rocky Mountains. We review the current systematics and historic taxonomic placement of this taxon and its placement in both Cymbella and Cymbopleura. Valve morphology and ultrastructure are presented based on light (LM) and scanning electron microscope (SEM)_investigations. LM and SEM observations show this species lacks apical pore fields, a key feature helping to definitively place this taxon in Cymbopleura. We discuss the distribution of this species in higher latitude freshwater environments.
References
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Agardh, C.A. (1830) </span><span lang="en-GB"><em>Conspectus Criticus Diatomacearum. Part 1.</em></span><span lang="en-GB"> Berling, Lund, 16 pp. </span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Bahls, L.L. (2019) </span><span lang="en-GB"><em>Cymbellafalsa, Cymbopleura</em></span><span lang="en-GB">, and </span><span lang="en-GB"><em>Delicatophycus</em></span><span lang="en-GB"> (Bacillariophyta) - Taxonomy, Ecology, Biogeography. </span><span lang="en-GB"><em>Diatoms from Western North America</em></span><span lang="en-GB"> (Vol. 2). </span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Buczkó, K., Ognjanova-Rumenova, N., Wojtal, A.Z. & Stengerkovács, C. (2015) Ultrastructure and taxonomic position of </span><span lang="en-GB"><em>Cymbella latestriata</em></span><span lang="en-GB"> Pantocsek (Bacillariophyta). </span><span lang="en-GB"><em>Phytotaxa </em></span><span lang="en-GB">207 (2): 172–180. https://doi.org/10.11646/phytotaxa.207.2.3</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Glushchenko, A., Maltsev, Y.I., Kociolek, J.P., Kuznetsova, I.V. & Kulikovskiy, M. (2022) Molecular and morphological investigation on two giant </span><span lang="en-GB"><em>Cymbella</em></span><span lang="en-GB"> species from Transbaikal area (Russia, Siberia) with comments on its distribution. </span><span lang="en-GB"><em>Plants</em></span><span lang="en-GB"> 11: 2445. https://doi.org/10.3390/plants11182445.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Giribet, G. (2015) Morphology should not be forgotten in the era of genomics-a phylogenetic perspective. </span><span lang="en-GB"><em>Zoologischer Anzeiger - A Journal of Comparative Zoology</em></span><span lang="en-GB"> 256: 96–103.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kermarrec, L., Ector, L., Bouchez, A., Rimet, F. & Hoffmann, L. (2011) A preliminary phylogenetic analysis of the cymbellales based on 18s rdna gene sequencing. </span><span lang="en-GB"><em>Diatom Research </em></span><span lang="en-GB">26 (3): 305–315. https://doi.org/10.1080/0269249X.2011.633255</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kezlya, E., Glushchenko, A., Kociolek, J.P., Maltsev, Y., Gusev, E., Genkal, S., Kuznetsov, A. & Kulikovskiy, M. (2022) A new soil species of </span><span lang="en-GB"><em>Placoneis </em></span><span lang="en-GB">(Bacillariophyceae) from southern Vietnam. </span><span lang="en-GB"><em>Cryptogamie; Algologie</em></span><span lang="en-GB"> 43 (11): 177–188.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kociolek, J.P., Blanco, S., Coste, M., Ector, L., Liu, Y., Karthick, B., Kulikovskiy, M., Lundholm, N., Ludwig, T., Potapova, M., Rimet, F., Sabbe, K., Sala, S., Sar, E., Taylor, J., Van de Vijver, B., Wetzel, C.E., Williams, D.M., Witkowski, A. & Witkowski, J. (2022) DiatomBase. Accessed at: http://www.diatombase.org/aphia. https://doi.org/10.1080/0269249X.2011.633255</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kociolek, J.P., Williams, D.M., Stepanek, J., Liu, Q., Liu, Y., Qingmin, Y. & Karthick, B. (2019) Rampant homoplasy and adaptive radiation in pennate diatoms. </span><span lang="en-GB"><em>Plant Ecology and Evolution</em></span><span lang="en-GB"> 152: 131–41.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kociolek, J.P. & Williams, D.M. (2015) How to define a diatom genus? Notes on the creation and recognition of taxa, and a call for revisionary studies of diatoms. </span><span lang="en-GB"><em>Acta Botanica Croatica</em></span><span lang="en-GB">, 74 (2): 195–210.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Krammer, K. (2002) The genus </span><span lang="en-GB"><em>Cymbella</em></span><span lang="en-GB">. </span><span lang="en-GB"><em>Diatoms of Europe </em></span><span lang="en-GB">3: 1–584.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Krammer, K. (2003) </span><span lang="en-GB"><em>Cymbopleura, Delicata, Navicymbula, Gomphocymbellopsis, Afrocymbella.</em></span> <span lang="en-GB"><em>Diatoms of Europe</em></span><span lang="en-GB"> 4: 1–530.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Krammer, K. (1997) Die cymbelloiden Diatomeen - Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und </span><span lang="en-GB"><em>Encyonema</em></span><span lang="en-GB"> Part. </span><span lang="en-GB"><em>Bibliotheca Diatomologica </em></span><span lang="en-GB">36: 1–382. </span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Krammer, Kurt. (1982) </span><span lang="en-GB"><em>Valve morphology in the genus Cymbella C.A. Agardh</em></span><span lang="en-GB">. </span><span lang="en-GB"><em>Micromorphology of Diatom Valves</em></span><span lang="en-GB"> 11: 1–299.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kützing, F.T. (1844) </span><span lang="en-GB"><em>Die Kieselschaligen. Bacillarien oder Diatomeen.</em></span> <span lang="en-GB"><em>Nordhausen. </em></span><span lang="en-GB">152 pp. https://doi.org/10.5962/bhl.title.64360</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Lange-Bertalot, H. & Genkal, S. (1999) Diatoms from Siberia I - Islands in the Arctic Ocean (Yugorsky-Shar Strait). </span><span lang="en-GB"><em>Iconographia Diatomologica </em></span><span lang="en-GB">6: 1–292.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Le Cohu, R., Lange–Bertalot, H. & Azémar, F. (2011) </span><span lang="en-GB"><em>Cymbopleura pyrenaica</em></span><span lang="en-GB"> sp. nov. (Bacillariophyceae) et d’autres espèces du même genre rarement recensées dans quelques lacs des Pyrénées françaises. </span><span lang="en-GB"><em>Cryptogamie; Algologie</em></span><span lang="en-GB"> 32: 337–349. https://doi.org/10.7872/crya.v32.iss4.2011.337</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Lee, M.S.Y. & Palci, A. (2015) Morphological phylogenetics in the genomic age. </span><span lang="en-GB"><em>Current Biology</em></span><span lang="en-GB">. 25: R922–R929.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Medlin, L.K. (2010) Pursuit of a natural classification of diatoms: An incorrect comparison of published data. </span><span lang="en-GB"><em>European Journal of Phycology</em></span><span lang="en-GB"> 45 (2): 155–166.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Nakov, T., Ruck, E.C., Galachyants, Y., Spaulding, S.A. & Theriot, E.C. (2014) Molecular phylogeny of the Cymbellales (Bacillariophyceae, Heterokontophyta) with a comparison of models for accommodating rate variation across sites. </span><span lang="en-GB"><em>Phycologia </em></span><span lang="en-GB">53 (4): 359–373. https://doi.org/10.2216/14-002.1</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Reichardt, E. (2011) Beitrag zur Diatomeenflora (Bacillariophyceae) des Paterzeller Eibenwaldes. </span><span lang="en-GB"><em>Berichte der Bayerischen Botanischen Gesellschaft</em></span><span lang="en-GB"> 81: 5–28.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Schmidt, A. (1875) Atlas der Diatomaceen-kunde. Series I, Heft 3, Tafeln 9-12. O. Reisland, Leipzig.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Van Heurck, H. (1880) </span><span lang="en-GB"><em>Synopsis des Diatomées de Belgique.</em></span><span lang="en-GB"> Atlas. Ducaju & Cie., Anvers.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Williams, D.M. (2007) Classification and diatom systematics: The past, the present, and the future. </span><span lang="en-GB"><em>Systematics Association Special Volume</em></span><span lang="en-GB"> 75: 57–92.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Williams, D.M. & Kociolek, J.P. (2007) Pursuit of a natural classification of diatoms: History, monophyly and the rejection of paraphyletic taxa. </span><span lang="en-GB"><em>European Journal of Phycology</em></span><span lang="en-GB"> 42: 313–319.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Williams, D.M. & Kociolek, J.P. (2010) Classifications of convenience: The meaning of names. </span><span lang="en-GB"><em>Diatom Research</em></span><span lang="en-GB"> 25 (1): 213–216.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Bahls, L.L. (2019) </span><span lang="en-GB"><em>Cymbellafalsa, Cymbopleura</em></span><span lang="en-GB">, and </span><span lang="en-GB"><em>Delicatophycus</em></span><span lang="en-GB"> (Bacillariophyta) - Taxonomy, Ecology, Biogeography. </span><span lang="en-GB"><em>Diatoms from Western North America</em></span><span lang="en-GB"> (Vol. 2). </span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Buczkó, K., Ognjanova-Rumenova, N., Wojtal, A.Z. & Stengerkovács, C. (2015) Ultrastructure and taxonomic position of </span><span lang="en-GB"><em>Cymbella latestriata</em></span><span lang="en-GB"> Pantocsek (Bacillariophyta). </span><span lang="en-GB"><em>Phytotaxa </em></span><span lang="en-GB">207 (2): 172–180. https://doi.org/10.11646/phytotaxa.207.2.3</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Glushchenko, A., Maltsev, Y.I., Kociolek, J.P., Kuznetsova, I.V. & Kulikovskiy, M. (2022) Molecular and morphological investigation on two giant </span><span lang="en-GB"><em>Cymbella</em></span><span lang="en-GB"> species from Transbaikal area (Russia, Siberia) with comments on its distribution. </span><span lang="en-GB"><em>Plants</em></span><span lang="en-GB"> 11: 2445. https://doi.org/10.3390/plants11182445.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Giribet, G. (2015) Morphology should not be forgotten in the era of genomics-a phylogenetic perspective. </span><span lang="en-GB"><em>Zoologischer Anzeiger - A Journal of Comparative Zoology</em></span><span lang="en-GB"> 256: 96–103.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kermarrec, L., Ector, L., Bouchez, A., Rimet, F. & Hoffmann, L. (2011) A preliminary phylogenetic analysis of the cymbellales based on 18s rdna gene sequencing. </span><span lang="en-GB"><em>Diatom Research </em></span><span lang="en-GB">26 (3): 305–315. https://doi.org/10.1080/0269249X.2011.633255</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kezlya, E., Glushchenko, A., Kociolek, J.P., Maltsev, Y., Gusev, E., Genkal, S., Kuznetsov, A. & Kulikovskiy, M. (2022) A new soil species of </span><span lang="en-GB"><em>Placoneis </em></span><span lang="en-GB">(Bacillariophyceae) from southern Vietnam. </span><span lang="en-GB"><em>Cryptogamie; Algologie</em></span><span lang="en-GB"> 43 (11): 177–188.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kociolek, J.P., Blanco, S., Coste, M., Ector, L., Liu, Y., Karthick, B., Kulikovskiy, M., Lundholm, N., Ludwig, T., Potapova, M., Rimet, F., Sabbe, K., Sala, S., Sar, E., Taylor, J., Van de Vijver, B., Wetzel, C.E., Williams, D.M., Witkowski, A. & Witkowski, J. (2022) DiatomBase. Accessed at: http://www.diatombase.org/aphia. https://doi.org/10.1080/0269249X.2011.633255</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kociolek, J.P., Williams, D.M., Stepanek, J., Liu, Q., Liu, Y., Qingmin, Y. & Karthick, B. (2019) Rampant homoplasy and adaptive radiation in pennate diatoms. </span><span lang="en-GB"><em>Plant Ecology and Evolution</em></span><span lang="en-GB"> 152: 131–41.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kociolek, J.P. & Williams, D.M. (2015) How to define a diatom genus? Notes on the creation and recognition of taxa, and a call for revisionary studies of diatoms. </span><span lang="en-GB"><em>Acta Botanica Croatica</em></span><span lang="en-GB">, 74 (2): 195–210.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Krammer, K. (2002) The genus </span><span lang="en-GB"><em>Cymbella</em></span><span lang="en-GB">. </span><span lang="en-GB"><em>Diatoms of Europe </em></span><span lang="en-GB">3: 1–584.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Krammer, K. (2003) </span><span lang="en-GB"><em>Cymbopleura, Delicata, Navicymbula, Gomphocymbellopsis, Afrocymbella.</em></span> <span lang="en-GB"><em>Diatoms of Europe</em></span><span lang="en-GB"> 4: 1–530.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Krammer, K. (1997) Die cymbelloiden Diatomeen - Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und </span><span lang="en-GB"><em>Encyonema</em></span><span lang="en-GB"> Part. </span><span lang="en-GB"><em>Bibliotheca Diatomologica </em></span><span lang="en-GB">36: 1–382. </span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Krammer, Kurt. (1982) </span><span lang="en-GB"><em>Valve morphology in the genus Cymbella C.A. Agardh</em></span><span lang="en-GB">. </span><span lang="en-GB"><em>Micromorphology of Diatom Valves</em></span><span lang="en-GB"> 11: 1–299.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Kützing, F.T. (1844) </span><span lang="en-GB"><em>Die Kieselschaligen. Bacillarien oder Diatomeen.</em></span> <span lang="en-GB"><em>Nordhausen. </em></span><span lang="en-GB">152 pp. https://doi.org/10.5962/bhl.title.64360</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Lange-Bertalot, H. & Genkal, S. (1999) Diatoms from Siberia I - Islands in the Arctic Ocean (Yugorsky-Shar Strait). </span><span lang="en-GB"><em>Iconographia Diatomologica </em></span><span lang="en-GB">6: 1–292.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Le Cohu, R., Lange–Bertalot, H. & Azémar, F. (2011) </span><span lang="en-GB"><em>Cymbopleura pyrenaica</em></span><span lang="en-GB"> sp. nov. (Bacillariophyceae) et d’autres espèces du même genre rarement recensées dans quelques lacs des Pyrénées françaises. </span><span lang="en-GB"><em>Cryptogamie; Algologie</em></span><span lang="en-GB"> 32: 337–349. https://doi.org/10.7872/crya.v32.iss4.2011.337</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Lee, M.S.Y. & Palci, A. (2015) Morphological phylogenetics in the genomic age. </span><span lang="en-GB"><em>Current Biology</em></span><span lang="en-GB">. 25: R922–R929.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Medlin, L.K. (2010) Pursuit of a natural classification of diatoms: An incorrect comparison of published data. </span><span lang="en-GB"><em>European Journal of Phycology</em></span><span lang="en-GB"> 45 (2): 155–166.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Nakov, T., Ruck, E.C., Galachyants, Y., Spaulding, S.A. & Theriot, E.C. (2014) Molecular phylogeny of the Cymbellales (Bacillariophyceae, Heterokontophyta) with a comparison of models for accommodating rate variation across sites. </span><span lang="en-GB"><em>Phycologia </em></span><span lang="en-GB">53 (4): 359–373. https://doi.org/10.2216/14-002.1</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Reichardt, E. (2011) Beitrag zur Diatomeenflora (Bacillariophyceae) des Paterzeller Eibenwaldes. </span><span lang="en-GB"><em>Berichte der Bayerischen Botanischen Gesellschaft</em></span><span lang="en-GB"> 81: 5–28.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Schmidt, A. (1875) Atlas der Diatomaceen-kunde. Series I, Heft 3, Tafeln 9-12. O. Reisland, Leipzig.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Van Heurck, H. (1880) </span><span lang="en-GB"><em>Synopsis des Diatomées de Belgique.</em></span><span lang="en-GB"> Atlas. Ducaju & Cie., Anvers.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Williams, D.M. (2007) Classification and diatom systematics: The past, the present, and the future. </span><span lang="en-GB"><em>Systematics Association Special Volume</em></span><span lang="en-GB"> 75: 57–92.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Williams, D.M. & Kociolek, J.P. (2007) Pursuit of a natural classification of diatoms: History, monophyly and the rejection of paraphyletic taxa. </span><span lang="en-GB"><em>European Journal of Phycology</em></span><span lang="en-GB"> 42: 313–319.</span></span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB">Williams, D.M. & Kociolek, J.P. (2010) Classifications of convenience: The meaning of names. </span><span lang="en-GB"><em>Diatom Research</em></span><span lang="en-GB"> 25 (1): 213–216.</span></span></span></span></p>